A New Entry for Short and Regioselective Synthesis of [1,2,4]Triazolo[4,3‐b][1,2,4]‐triazin‐7(1H)‐ones |
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Authors: | Ahmad S. Shawali Sobhi M. Gomha |
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Abstract: | Reaction of benzenediazonium chloride with active [1,2,4]triazin‐3‐ylthio‐methylene compounds 3 afforded the azo coupling products 5 , which yielded [1,2,4]triazolo[4,3‐b][1,2,4]triazin‐7(1H)‐ones 8 upon treatment with sodium ethoxide in ethanol. The latter products 8 were characterized on the basis of alternate synthesis and spectral data. The mechanism of formation of 8 and the regiochemistry of the studied reactions are discussed. |
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Keywords: | Heterocycles Hydrazones Rearrangements Synthetic methods 1,2, 4‐Triazolo‐triazinone |
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